Means for and method of controlling the current supply to alpha load circuit



MEA'risFo AND METHOD OF CONTROLLING THE CURRENT SUPPLY TO A LOAD CIRCUIT- Filed Dec. 1927 Nov, 24, 1.931. H. w. B'RQWN' 1,83%??? Inventor: Harold W Brown His Attorney a F N rEDsnTE i'Aiio n w. rown,

Patented Nov. 24, 1931 MEANS METHDVF mie m THE CURRENT Y'IO A LOAD tam PATENTO FFI CE if Q or scnEn cTanY, imw ronnnssrenonno mime; riLnof BId; 7

company, AVCORPOIQATION on NEW YORK 1 Application filed December 22,1927. Serial No.241 ,942.

i invention relates to amplifiers and -,circuit, which is suppliedby anamplifier;

- Devices are'now known whereby the outmore particularly to a method and means for use in iconnection with-amplifiers for controllingthe supply of current to a load put'froin an amplifier to alload circuit may be maintained substantially constant independentlyof=variations in the magnitude of the currentsuppliedto the :input of the amplifier circuit. These devices comprise means for varying the amplification characteristics of the amplifier in response intensityxofthe input currents.

In accordance with my present invention I provide a method and means tfor malntalningthe supply of currents to a load circuit,

which is supplied b an amplifier, substan-' tially'independent 0 variations in the ampll- I fication characteristics of the amplifier itself. Inits broader aspects my invention comprises the ideaof ereating a plurality of paths connected between the supply circuit. and'the load circuit, and in controlling the supply of current through certain of .said

paths in response to variations in the transmissioncharacteristics of other of said paths. -Th'e novel features'which I believe to be characteristic "of my invention are set forth. Mylinven'ti'on itself; howeveryboth as to vits organization and in the appended claims.

method of operation, to ether. with further objects; and advantages t 'ereof, ma bestbe' understood "by reference i'to the- 0110w n descriptiontaken in" connection with the ac companying drawing, which shows oneembodiment ofmy invention.

Re'ferringto the drawing, -1 Q'represent electron discharge devices,each of which is connected to sup ly'currents from asupply circuit 3 toa oad circuit 4; Each ot these devices comprisesagrid, an anode and a c athode. The supply circuit 3 is con-- nected between the grid. and the cathode of thec'devicell and the load circuits; is connected between the anode andthe cathode of the} device-2. 5 represents a transformer having a'primary winding 6 and a secondary winding 7 The primary winding-6 of this.

transformer is connected in series with the to the.

output of thedevice land the oad The secondary, winding? of'this' transformer is connected iniseries betweenthe supplyjf between the terminals of the secondary wind-- mg 7 is-in series opposed relation with the 1 circuit 3 and the input'ofthedevice 2, the

arrangementbeing such that the potential potential of the supply circuit 3. V Thefratio. v of transformation of the transformer 5 i-si across the winding 7 is proportionalto the current flowing injthe anodecircuit ofithe device 1. 8, 9, 10 represent a suitabl'eim pedance' network, which may comprise a5 single resistance 8 or suitable combination of resistance inductance and capacity, such 7 as 8, 9, 10 which is connected in circuit with the primary winding 6 of the transformer device ltogether with suitable. inductance 9 I 0 1 for the purpose of caus ngthevoltage across and capacity 10 whereby the phaserelation between the secondary voltage andprimary current may be adjustedgto the desired value;

-11 and 12 represent sources ofpotentia1 toru normal amplification of [the deyice 1 list t k ,ing place no potential will be impressed upon the grid ofthe device-I2 since ,theapotential of energizing the, anode and: cathddej circuits:

respectively .ofthe'devicesl and 2,12 t Aslthus arranged-tw ll, beiselen-that while;

the winding 7 is iii-series opposed} relation to 1 that "of the source {3 in the circuit .of the grid,

norm ally-inactive; yIf the amplification ratio the device, 2, with thezresult that sufiic'ientr current would be supplied to the load gt of the devicel, however, should diminish r. u v and cathode of -the" device 2 Thus thi 'sipa thf 3 f v I connecting the supply and; load circuits" is a 1 l .of the transformer 7 Will be greater than that of the source 3 with the resultthat a portion of this potential Will be effective upon thegrid of thehdevice 2. This potential, however, will be in" substantially opposed phase relation to the current flowing through theload tfrom the device-1, vvithtl e result,

that it Will cause a diminution of the current v in the load suflicient to compensate f0ruthe;

increased amplification ratioof the device 1.

T-hus itvvill-be seen-that any effect upon the load tfof changes in the amplification chara'ci teri'stics o'f'the'device 1 Will be'substantially compens ated, by currents from the device 2'. 9;

the load circuit, these paths comprising electron discharge-devices,it Willof coursebeunderstood thatmy inventionmay be em-- ployed in connection With a greater number of'zpaths and paths-'Which'are otherwise constituted as Well.

7 While I have shown anddescribed single .0:- embodiment of-my invention it Will, of course,

be understood that Ido'not Wish to be 1im-' 'itedthereto since many modifications both in the.-'circuit arrangements and instrumentalit'ies employed, maybe made Without departingfrom the spirit and-scope of'my invention-as setforth in the app'endedfclaims.

What-'Iclaimas new and desire to secu're- V by'L'etters Patent of the United States, is

In combination, a load,'- means for sup} plying" current to said load,"means foram plifying said current and separate means responsive to variationsin the amplification" supplying current said load.

- In "comb characteristics ofjsaid amplifying-means for lel,'iea'ch'foffsaid devic'es-having an input circuit and-means for controlling the input to .one'-of said-devices in rsponsejto thee-ratio between the "input and output; from another of'said devices.

, In combinatiom'a upply circuit; afload. circuit, a-" plurality of parallel amplification paths connecting said circuits and means for controlling the current .through one 7 of said amplification of another of said paths.

electron discharge devices in response to the Wh'ile-in the particular embodiment of my; invention shown there are represented only 7 two paths connecting the supplycircuit to nation, a plurality of amplifying-deviceshaving a common output cirfc'uit with-Which they are connected in paralpaths in response" to the variations in the 4. In-combination,-a load circuit, a supply of-sa'id first de'vi'ceand said load circuit and 1 e a secondaryivvindi'ng connected in series with. the grid of said other' device and saidsupply circuitiwhereby the grid supply to said other device is determined by the ratio between the 0 input and output: from said first-device plying. current to vsaid load, means foramp i-I fying said current, an electron discharge (16,- vice having aerjigrid',i' said :device" being con-.- 5 nected between said supply means and said load in .apath shunting: said, amplifying means and means foracontrolling saidgrid? in response: .to theamplificationcharacter; istics of said amplifyingmeans. n0

1 7. In t combination, a: load, a: source v-of;.po-. tential, means for amplifyingz said potential,- and for supplying said potential'tosaidiload, v an electron discharge device ha'vinggan: output circuit including saidload-andan-input 9a circuit including said source of potential, additional means responsive tothe output? currents from; said amplifyingmeans "for; supplying to said input circuit. a-potentialf Which-is normally equallando-pposite in: 10 phaseitovthe potential of'said source, said- 1 potential beingjivariable in responseto themagnitude of the currents from saidampli fying means, thereby: to control the supply: ofcurrenttosaidload; 1 I 8. In-combination, a load, a sourceofpo; tential, means for amplifying said potential: and for supplying saidpotential to saidload, anelectron discharge device having, an :out put circuit including said load andxaniinput 1m circuit including said source of potential-, a:, transformer havinga primary vvvin'ding 1=con nectednin-circu'itwith said-loadland-said aimlplifying means and; a secondary winding; v

connected in said.- input ciicuit in seriescoprj: 118 posed relation with-said; sourceof potential, the transformation. ratio of said transformer being equal: to the inverse amplification ratio of'rsaid amplifier, whereby the} output from; 1

said discharge device-is .controlled'by theam mo plification characteristics ofsaid amplifier;

59;: In'cornbination, a load circuit asupply? circuit, a normally active path connecting;

said: circuits, a normally inactive path con? 7 necting saidscircuits.'andfmeans for render;

1 ing said normally inactive path active inresponse to andproportional to changes in the transmission characteristics of saidnormallyi active path; I

- 10. z The method oflcontrelling the spay 1 1 6;In combination, a load,*me-a n"s' for suof said paths in response to variations in the transmission characteristics of another of said paths.

11. The method of rendering the supply of current to a load independent of the amplification characteristics of an amplifier connected between the source of said currents and said load consisting in causing an additional current to flow between said source and said load and. in varying said current in response to changes in the amplification characteristics of said amplifier.

'12. The method for use where amplifiers are employed to supply current from a source of potential to a load to render the supply of current to said load substantially independent of the amplification characteristics of the amplifiers, consisting in creating an electron discharge current separate from said amplifier, supplying both the output from said amplifier and said electron discharge current to said load, producing a potential which is variable both in direction and in magnitude with the difference between the output from and the input to said amplifier and in controlling said discharge current in response to said potential whereby'variations in said discharge current compensates for variations in the output from said amplifier.

In witness whereof, I have hereunto set my hand this 20th day of December, 1927. HAROLD W. BROWN. 

